SR20DET Engine Mods/Aftermarket parts

Post by **Jala47** » Thu Apr 22, 2004 5:56 am

If I were to purchase an S15 SR20DET would I have to get all of my parts for the engine or anything related need to be imported or could I locate them here?

And if i want to add Aftermarket producst to this engine would those also be required to be imported or can they be located here as well??

BTW Does anyone here know of the "Secret Services" in St. Pete, FL? http://www.secretservicesinc.com/index.html and have they used them before because i'm still debating wether going to them or going to XATRacing for my engine/fron clip

Post by **Onizuka** » Thu Apr 22, 2004 5:56 am

Im pretty sure the S14 and S15 long blocks are almost exactly the same, but the clutch, transmission and rear end are all different.

Post by **S13240** » Thu Apr 22, 2004 5:56 am

J-Spec Tuner wrote:Im pretty sure the S14 and S15 long blocks are almost exactly the same, but the clutch, transmission and rear end are all different.

Remember that people in japan swap out their 6spd trannies out for s13 or s14 trannies.

BTW, nothing but good things heard about Secret Services.

Post by **Jala47** » Thu Apr 22, 2004 5:56 am

S13240 wrote:Remember that people in japan swap out their 6spd trannies out for s13 or s14 trannies.

BTW, nothing but good things heard about Secret Services.

Why would they swap out the trannies for older ones? are they not as good or do they just want 5 speeds? -sighs- I previously heard that the S15 SR's where better... so should i just get an S14 SR20DET instead? Only reason i was going for the S15 was because i read that it had more HP which it does and something about the the turbo being bigger or spooling up faster or what not but if that 30 extra HP is the only diff then i'd just go for the cheaper S14

Post by **Jala47** » Thu Apr 22, 2004 5:56 am

and couldn't I just keep the transmission from the 240SX or would i have to get a JDM one as well?

Post by **Siddhartha** » Thu Apr 22, 2004 5:56 am

S15 has more hp stock.

Think about the 6spd this way; 6 gears in almostthe same space 5 gears were before. Basically, the 6spd is weaker, or so I've heard from people on the board.

Post by **Onizuka** » Thu Apr 22, 2004 5:56 am

Its not weaker really, its just that if you break a SR 6 speed, whats cheaper to replace it with: A $4000 new 6 speed from the dealer? or a $200 5 speed from the junkyard?

Post by **Jala47** » Thu Apr 22, 2004 5:56 am

so basically i should get the S15 engine and an S13-14 transmission... hmmm

Post by **VitaminT** » Thu Apr 22, 2004 5:56 am

I would get the S15 engine and S15 transmission. Then if it goes out sometime down the road just replace it with a S14 5 spd. The way I see it is if you are going to spend the $$$ for the S15 motor why not go ahead and get the S15 transmission. Plus most of the transmission's probably have way low miles, so there is less of chance the syncros are trashed.

Post by **Siddhartha** » Thu Apr 22, 2004 5:56 am

If it isn't weaker then why do dudes in japan trade them for 5spds?

Post by **VitaminT** » Thu Apr 22, 2004 5:56 am

I don't care if it is weaker or not. I would still want it. So be it if it breaks after a few thousand miles. You can't tell me that it is going down the drain with the car on the stock turbo. I mean I may not expect it to hold 400+whp, but it should hold what the stock turbo can do. And if not scrap it and try again with a 5spd.

I guess my point is why not? He is probably going to end up paying for it anyway.

Post by **Onizuka** » Thu Apr 22, 2004 5:56 am

Siddhartha wrote:If it isn't weaker then why do dudes in japan trade them for 5spds?

J-Spec Tuner wrote:Its not weaker really, its just that if you break a SR 6 speed, whats cheaper to replace it with: A $4000 new 6 speed from the dealer? or a $200 5 speed from the junkyard?

In all my years i have never seen one case of a 6 speed breaking or being swapped out. It is my firm belief thats all just internet rumor.

Post by **Jala47** » Thu Apr 22, 2004 5:56 am

VitaminT wrote:I don't care if it is weaker or not. I would still want it. So be it if it breaks after a few thousand miles. You can't tell me that it is going down the drain with the car on the stock turbo. I mean I may not expect it to hold 400+whp, but it should hold what the stock turbo can do. And if not scrap it and try again with a 5spd.

I guess my point is why not? He is probably going to end up paying for it anyway.

what don't you expect to make 400 whp? if you mean the SR20DET transmission i've seen one hit 422 on a Dyno before in person.. I wasn't to sure if it was WHP or not but it was 422 and it held it just fine

Post by **VitaminT** » Thu Apr 22, 2004 5:56 am

I just used that number as an example. I don't think anyone REALLY knows what the 6spd will hold simply due to the lack of them in high HP cars in the US. You may be able to find some info from RHD cars.

Post by **Jala47** » Thu Apr 22, 2004 5:56 am

VitaminT wrote:I just used that number as an example. I don't think anyone REALLY knows what the 6spd will hold simply due to the lack of them in high HP cars in the US. You may be able to find some info from RHD cars.

Where's RHD cars?? and anywayz wouldn't a 6spd transmission be able to withstand more than a 5 speed? essentially? or am i just off?

Post by **VitaminT** » Thu Apr 22, 2004 5:56 am

Not necessarily. The durability has nothing to do with the number of gears. I would think that due to it being design 10 years after the redtop and other trannys that it should be stronger, but the "theory" is that if you have 6 gears in the same physical space as 5 then they have to be small and therefore weaker.

Post by **Siddhartha** » Thu Apr 22, 2004 5:56 am

I stand corrected.

They belief was that they put 6 gears in the same place they put 5 gears before, so the gears were slightly narrower, but if the changed the design of the gears and the materials they are made of then the 6spd could be as strong/stronger even that the 5spd.

Post by **VitaminT** » Thu Apr 22, 2004 5:56 am

Isn't technology great.

Post by **Morph** » Thu Apr 22, 2004 5:56 am

Jala47 why do you want to put your self through all of this headache just for 50 more hp.

Post by **Nismo_Freak** » Thu Apr 22, 2004 5:56 am

Siddhartha wrote:If it isn't weaker then why do dudes in japan trade them for 5spds?

Wider gearing between gears... no one wants to shift 18 times when they only have to shift 10 times with a 5-speed.

6-speeds aren't faster, they just get better gas milage and can have more top end.

Post by **Jala47** » Thu Apr 22, 2004 5:56 am

Morph wrote:Jala47 why do you want to put your self through all of this headache just for 50 more hp.

well it's like 20-30 or something but the engines also newer so i'd just figure it'd be better to get overall -shrugs- it'd be worth it in the long run my only problem now is figuring out how to get all the parts for it -shrugs- that might be a hassle

Post by **Morph** » Thu Apr 22, 2004 5:56 am

Ya its newer and has a 6speed trans but its going to be a long hard install IMHO its not worth it at all for a few minor pluses. My s13 took 3+months i cant imaging what an s15 would be.

Post by **Jala47** » Thu Apr 22, 2004 5:56 am

is 3 months normal for an engine swap like that? (S15 into a 97-98 240?)

Post by **Morph** » Thu Apr 22, 2004 5:56 am

na dude thats my expierence. and its still going:D

Post by **VitaminT** » Thu Apr 22, 2004 5:56 am

And I though that my redtop in a S13 taking 6 weeks was insane. Of course I was doing it by myself (wiring and all) and only had simple hand tools.

SR20DET Engine Mods/Aftermarket parts

SR20DET Engine Mods/Aftermarket parts

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